Railway-car-truck bolster.



PATENTBD MAY 5, 190.3. H. R. KEITHLEY. RAILWAY CAR TRUCK BOLSTBR.

APPLICATION FILED 00T. 15, 1902.

NO MODEL.

\ Tn: Norms warms co. mommmoxmsmmc UNITED STATES Patented May 5, 1903.

HERBERT R. KEITHLEY, OF- BUFFALO, NEW YORK.

RAI LWA'Y-CAR-TRUCK BOLSTER.

SPECIFICATION forming part of Letters Patent No. 727,149, dated May 5, 1903.

Application filed October 15,1902. Serial No. 127,371. (No model.)

To LL'Z whom it may concern,.-

Be it known that I, HERBERT R. KEITHLEY, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Railway- Car-Truck Bolsters, of which the following is aspeciiication. e

This invention relates more particularly to a metallic box-bolster for railway-car trucks.

Built-up box-bclsters have been produced heretofore, but they have either been formed in part or in whole of pressed-steel parts, requiringthe employment of specially-designed and expensive dies or forming-machines, or they have been built up in part or in whole of rolled shapes, which in order to secure the necessary strength and stiness have been needlessly multiplied and of complicated arrangement, thus increasing the weight and cost of the bolster.

The object of this invention is to provide an exceedingly light, strong, and cheap boxbolster which is built up of the minimum nu n1- ber of pieces and composed entirely of commercial-rolled shapes and plates having only simple straight bends and which can be readily formed in metal-working shops as ordinarily appointed.

While the bolster herein described and shown in the drawings is primarily intended for a truck-bolster, it is not necessarily restricted to such use.

In the accompanying drawings, Figure 1 is a side elevation of a bolster embodying the invention. Fig. 2 is a longitudinal section thereof. Fig. 3 is an end view thereof, and Fig. 4 is a central transverse section thereof.

Like letters of reference refer to like parts` ilanges, which thus relieve the rivets d from' flanges, to which they are securely attached throughout the length of the bolster by rivets e. The side plates are provided at the lower edges of their end portions with integral horizontal straight flanges F, which project inwardly and bear on the upper face of the channel-web, to which they are attached by rivets The ends of the bolster sides thus have a direct broad fiat bearing on the bottom channel and relieve the rivets connecting the sides and bottom channel from any vertical shear due to the load supported by the bolster and which is necessarily concentrated at the ends of the bolster, which rest on the supportingsprings. While the side plates are provided with top-and bottom flanges, these iianges are straight and are formed by simple straight bends, which can be .made by the usual flanging-machines. There are no bends requiring special dies or forming-machines.

The bolster is composed of only four simple parts riveted together, and while it can thus be readily and cheaply made Vit is very strong, rigid, and durable.

I claim as my inventionl. A bolster comprising a bottom channel arranged with its flanges projecting upwardly, side plates arranged inside of and riveted to said channel-anges, said side plates having integral bottom flanges at their ends which bear on the upper face of the channel-web, and integral inwardly-extending top flanges, and a top plate which is Vsupported by and riveted to said top iianges, substantially as set forth.

2. A box-bolster which is deeper at its'middle portion than at its end portions,'and comprising a bottom channel arranged with its flanges projecting upwardly, substantially vertical side plates arranged inside of and riv- IOC eted to said channel-anges, said side pla-tes l Witness myhand this 11th day of October, having integral straight bottom flanges at 1902. their ends which bear on the upper face of the 1 y ehanne1-Web,and integral straight top flanges HERBERT R' Khl FHLEY' 5 which project toward each other, and a top Vitnesses:

plate which bears on and is riveted to said CEAS. W. PARKER, top flanges, substantially as set forth. JNO. J. BONNER. 

